Amphastar PharmaceuticalsAMPH
13F holders, Q4 2024 (December 31)263holders −16
28new positions
49sold out
7famous investors
$37.14avg. 13F price*
At the end of Q4 2024, 263 institutions reported holding Amphastar Pharmaceuticals Inc. (AMPH) in their 13F filings, down 16 from Q3 2024. 28 opened new positions and 49 sold out. The largest holders were BlackRock, Inc. ($227.2M), Vanguard Group Inc. ($100.8M) and TD Asset Management Inc ($68.3M). 7 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Joel Greenblatt (0.0% of Gotham Asset Management's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Amphastar Pharmaceuticals Inc.
- CUSIP
- 03209R103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2024 → Q4 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 28 | $35.8M |
| Exits | 49 | $52.0M |
All 13F filers, Q3 2024 → Q4 2024: 3,883,781 shares bought and 4,146,917 shares sold, net −263,136 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 263 holders
| BlackRock, Inc. | 0.00% | Add +1.4% | 6,117,822 | $227.2M |
| Vanguard Group Inc. | 0.00% | Add +0.1% | 2,714,628 | $100.8M |
| TD Asset Management Inc | 0.06% | Reduce -13.8% | 1,840,286 | $68.3M |
| State Street Corp. | 0.00% | Add +4.3% | 1,596,110 | $59.3M |
| Neuberger Berman Group LLC | 0.04% | Reduce -14.9% | 1,374,125 | $51.0M |
| Pacer Advisors, Inc. | 0.11% | Add +51977.4% | 1,350,368 | $50.1M |
| Dimensional Fund Advisors LP | 0.01% | Add +9.6% | 1,198,590 | $44.5M |
| Fuller & Thaler Asset Management, Inc. | 0.16% | Reduce -10.1% | 1,132,926 | $42.1M |
| Epoch Investment Partners, Inc. | 0.20% | Reduce -7.5% | 1,101,273 | $40.9M |
| Boston Trust Walden Corp | 0.26% | Add +81.4% | 978,920 | $36.3M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.5% | 916,081 | $34.0M |
| Federated Hermes, Inc. | 0.07% | Reduce -57.7% | 823,487 | $30.6M |
| Morgan Stanley | 0.00% | Reduce -6.7% | 632,074 | $23.5M |
| Northern Trust Corp. | 0.00% | Add +5.1% | 613,170 | $22.8M |
| Marshall Wace, LLP | 0.03% | Add +7.1% | 608,706 | $22.6M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -0.4% | 566,656 | $21.0M |
| Renaissance Technologies | 0.03% | Add +7.4% | 525,500 | $19.5M |
| Bessemer Group Inc. | 0.03% | Add +2.4% | 488,630 | $18.1M |
| American Century Companies Inc. | 0.01% | Reduce -26.2% | 472,017 | $17.5M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -4.8% | 427,835 | $15.9M |
| Boston Partners | 0.02% | New | 426,636 | $15.8M |
| Granite Investment Partners, LLC | 0.64% | Reduce -2.2% | 396,702 | $14.7M |
| Mesirow Institutional Investment Management, Inc. | 1.09% | Reduce -8.1% | 380,389 | $14.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -0.7% | 347,512 | $12.9M |
| Invesco Ltd. | 0.00% | Reduce -10.2% | 298,864 | $11.1M |
| Bank of New York Mellon Corp | 0.00% | Add +12.7% | 285,863 | $10.6M |
| Nordea Investment Management AB | 0.01% | Add +4.8% | 279,714 | $10.4M |
| Millennium Management | 0.01% | Reduce -1.2% | 256,556 | $9.5M |
| Systematic Financial Management LP | 0.23% | New | 246,348 | $9.1M |
| Hotchkis & Wiley Capital Management LLC | 0.03% | Add +6.7% | 237,520 | $8.8M |
| Principal Financial Group Inc. | 0.00% | Add +3.0% | 207,978 | $7.7M |
| Janus Henderson Group PLC | 0.00% | Add +28.8% | 189,347 | $7.0M |
| Oberweis Asset Management Inc./ | 0.32% | Add +14.6% | 184,595 | $6.9M |
| Silvercrest Asset Management Group LLC | 0.04% | Reduce -1.0% | 166,814 | $6.2M |
| Assenagon Asset Management S.A. | 0.01% | Reduce -3.6% | 161,399 | $6.0M |
| UBS Group AG | 0.00% | Add +52.2% | 153,742 | $5.7M |
| JPMorgan Chase & Co. | 0.00% | Add +107.8% | 153,571 | $5.7M |
| Clark Capital Management Group, Inc. | 0.04% | Reduce -3.7% | 148,075 | $5.5M |
| Ameriprise Financial Inc. | 0.00% | Add +1.0% | 146,015 | $5.4M |
| Voloridge Investment Management, LLC | 0.02% | Add +16.2% | 143,436 | $5.3M |
| Citadel Advisors | 0.00% | Add +3.8% | 140,413 | $5.2M |
| Portolan Capital Management, LLC | 0.33% | Reduce -60.0% | 131,123 | $4.9M |
| Lam Group, Inc. | 3.46% | No change | 130,800 | $4.9M |
| Frontier Capital Management Co. LLC | 0.04% | Reduce -0.2% | 123,360 | $4.6M |
| D. E. Shaw & Co. | 0.01% | Add +402.4% | 118,851 | $4.4M |
| Qube Research & Technologies Ltd | 0.01% | Reduce -1.2% | 115,292 | $4.3M |
| Bank of America Corp. | 0.00% | Reduce -29.1% | 112,094 | $4.2M |
| Trexquant Investment LP | 0.05% | Add +18.2% | 105,528 | $3.9M |
| Legal & General Group Plc | 0.00% | Reduce -0.6% | 103,741 | $3.9M |
| Renaissance Group LLC | 0.15% | Add +42.5% | 99,572 | $3.7M |
| Jane Street Group, LLC | 0.01% | Add +56.4% | 99,487 | $3.7M |
| Two Sigma Investments, LP | 0.01% | Reduce -0.6% | 98,184 | $3.6M |
| Nuveen Asset Management, LLC | 0.00% | Reduce -54.0% | 95,665 | $3.6M |
| Public Sector Pension Investment Board | 0.01% | Add +15.9% | 93,430 | $3.5M |
| Raymond James Financial Inc. | 0.00% | — | 92,904 | $3.4M |
| Mutual of America Capital Management LLC | 0.04% | Reduce -0.1% | 92,251 | $3.4M |
| PDT Partners, LLC | 0.30% | Add +11.5% | 90,484 | $3.4M |
| Rhumbline Advisers | 0.00% | Add +1.4% | 87,327 | $3.2M |
| Two Sigma Advisers, LP | 0.01% | Reduce -12.6% | 85,900 | $3.2M |
| Barclays PLC | 0.00% | Add +13.9% | 84,790 | $3.1M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +8.9% | 83,231 | $3.1M |
| First Trust Advisors LP | 0.00% | Add +350.0% | 81,129 | $3.0M |
| Swiss National Bank | 0.00% | No change | 76,400 | $2.8M |
| New York State Common Retirement Fund | 0.00% | No change | 70,490 | $2.6M |
| Bridge City Capital, LLC | 0.69% | Reduce -1.4% | 70,095 | $2.6M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Reduce -19.5% | 67,367 | $2.5M |
| Victory Capital Management Inc. | 0.00% | Reduce -71.0% | 63,387 | $2.4M |
| Citigroup Inc. | 0.00% | Add +9.3% | 63,171 | $2.3M |
| Aurora Investment Counsel | 1.11% | Add +0.0% | 54,705 | $2.0M |
| Alliancebernstein L.P. | 0.00% | Add +1.8% | 50,630 | $1.9M |
| Campbell & CO Investment Adviser LLC | 0.14% | New | 47,566 | $1.8M |
| Twinbeech Capital LP | 0.03% | New | 46,797 | $1.7M |
| Prudential Financial Inc. | 0.00% | Reduce -1.6% | 38,694 | $1.7M |
| Aristeia Capital, L.L.C. | 0.11% | New | 43,235 | $1.6M |
| Schonfeld Strategic Advisors LLC | 0.01% | Add +343.6% | 42,614 | $1.6M |
| Intech Investment Management LLC | 0.02% | Add +224.6% | 42,156 | $1.6M |
| Assetmark, Inc. | 0.00% | Reduce -4.5% | 41,921 | $1.6M |
| Martingale Asset Management L P | 0.04% | Reduce -0.1% | 40,205 | $1.5M |
| BNP Paribas Financial Markets | 0.00% | Reduce -60.9% | 36,964 | $1.4M |
| LSV Asset Management | 0.00% | Reduce -54.7% | 36,400 | $1.4M |
| California State Teachers Retirement System | 0.00% | Reduce -1.6% | 36,369 | $1.4M |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -5.2% | 35,045 | $1.3M |
| Deutsche Bank AG | 0.00% | Add +46.6% | 34,082 | $1.3M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -7.1% | 32,203 | $1.2M |
| Susquehanna International Group, LLP | 0.00% | Add +111.5% | 31,266 | $1.2M |
| AQR Capital Management | 0.00% | Reduce -29.3% | 29,471 | $1.1M |
| Engineers Gate Manager LP | 0.02% | Add +10.1% | 29,108 | $1.1M |
| Thrivent Financial for Lutherans | 0.00% | Reduce -2.8% | 28,988 | $1.1M |
| Royal Bank of Canada | 0.00% | Add +8.0% | 28,632 | $1.1M |
| Gotham Asset Management | 0.01% | Reduce -20.4% | 28,448 | $1.1M |
| Sei Investments Co. | 0.00% | Reduce -31.8% | 28,125 | $1.0M |
| Arkadios Wealth Advisors | 0.06% | Add +5.2% | 27,964 | $1.0M |
| Franklin Resources Inc. | 0.00% | Reduce -3.7% | 27,405 | $1.0M |
| Chatham Capital Group, Inc. | 0.17% | Reduce -1.4% | 27,295 | $1.0M |
| State of Wisconsin Investment Board | 0.00% | Reduce -56.7% | 25,649 | $952K |
| Quantbot Technologies LP | 0.03% | New | 25,454 | $945K |
| Advisor OS, LLC | 0.11% | Reduce -2.4% | 25,405 | $943K |
| Glenmede Trust Co. NA | 0.00% | Reduce -34.7% | 24,743 | $919K |
| Polaris Capital Management, LLC | 0.04% | New | 24,500 | $910K |
| New York State Teachers Retirement System | 0.00% | No change | 23,866 | $886K |
"% of holder's portfolio" is AMPH's weight in each manager's 13F, not the share of Amphastar Pharmaceuticals Inc. the manager owns.